Update pytest-cov requirement from <=5.0.0 to <=6.0.0

Updates the requirements on [pytest-cov](https://github.com/pytest-dev/pytest-cov) to permit the latest version.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v1.0...v6.0.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements-dev.txt

@@ -3,7 +3,7 @@ flake8<=7.1.1
 pyright==1.1.387
 pytest<=8.3.3
 pytest-asyncio<0.25.0
-pytest-cov<=5.0.0
+pytest-cov<=6.0.0
 freezegun<1.6.0
 pyupgrade<3.20.0
 isort<5.14.0